Car underframe structure



D 1939- J. E. TESSEYMAN ET AL 2,183,

CAR UNDERFRAME STRUCTURE Filed July 14. 1957 5 Sheets-Swat 1 I I gwventopd r I %X wan;

13% 12, 9- ..a. E. TESS E YMAN ET! AL 2,183,054

' CAR UNDERFRAME STRUCTURE Filed July 14, 1937 5' -Sheet 2 amnion b/uv/ 721986 mall lauw 61/?! 11' 13% 1 1939- J. EQTESSEYMAN tr AL 2,183,054

7 A CAR UNDERFRAME STRUCTURE Fil d July 14, 19 7 5 Sheets-Sheet 3 I F I. u 0

9 J. E. TESSEYMAN El AL 2,183,054

CAR UNDERFRAME STRUCTURE Filed July 14, 1937 '5 Sheets-Sheet 4 N M Jolw fzzs-aman law:

Z, 1939- J. E. TESS'EYMAN El AL 8 5 CAR UNDERFRAME STRUCTURE Filed July 14, 1937 5 et 5 v v I 4 gwuntou Jam E 7219.96 112m Z0102? 6 zZl Patented Dec. 12, 1939 UNi 2,183,054 CAR UNDEBFRAME STBU John E. Tcssn and Louis G. Miller, Bethlehem, 2a., assignors to Bethlehem Steel Company, a corporation of i'yl'vania J Application July 14%, 1937, SerialNo. 153,484

25 Gin. (Cl. 105-414) in a car underframe structure.

Another object of our invention is to construct an underframe in such a manner that the entire load is carried on the side sills or girders in conjunction with a center sill made of a pair of Z-= 15 bars.

Another object of the invention relates to the manner of forming each of the side sills which are of the fish bellied type by taking arelatively thin plate to form the web member and weld a comparatively wide plate of thicker material to one edge to form the top flanges, and a narrower and somewhat thicker plate to the bottom edge of the web to formthe bottom flanges. These said plates forming the topand bottom flanges for the side sills are not centrally connected by welding to the web but have their greatest portion extending inwardly toward the center of the car.-

using a separate flat bar of less thickness than the main top flange member for the side sill which can be punched with bolt holes and then welded to the outwardly extending edge of the said top flange member forming an integral portion thereof adapted to provide means for attaching the floor thereto. The object of this separate member attached to the outwardly extending top flange of each side sill isto; avoid the necessity of drilling holes in the top plate as it would be impossible to punch this plate due to the small size of the holes required and the thickness of the plate. 1

Another object 01 the invention relates to the manner of constructing the bolster so as to resist the weaving stresses of the car in service with a single vertical web plate on each side of the center sill with a top tension or cover plate extending from side sill to side sill and attached thereto 50 and with the compression member for the bolster consisting of three plates,'the two outer plates are narrower and thicker than the central plate- 55 sills to-the center sill with the ends supported on Another object of the I invention relates to the bottom flanges of each sill and secured thereto.

The object of forming the compression member of three parts in the manner illustrated is to prevent as far as possible the two outer members 5 from bending or buckling under heavy load as is very often the case when the compreniion member of. the bolster is made in one piece and of thin material.

With the foregoing and other objects in view, 10 the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

Referring now to the accompanying five sheets of drawings which form a part of this speciflca- 1 tion and on which. like characters of reference indicate like parts- Figure 1 is a plan viewshowing slightly more than half of a car underframe adapted for a flat car with parts shown in section.

tions taken on the lines 4-4, 5-5, 6-8 and 'l- -i, 25

re p ctively, of Fig. 1. I

Fig. 8 is a plan view showing slightly more than half of a. modified form of a carnnderframe adapted for use in box. car construction, and

Figs. 9, 10, 11 and 12 are vertical transverse sec- 39- tions taken on the lines 99, I0l0, "-1! and I 2-H, respectively, of Fig. 8.

Referring now to the various characters oireference on the drawings; and first to Figs. 1 to 7, inclusive: 35

The center sill of the underframeis indicated at I, comprises a pair of rolled metal Z-bars 2 extending the full length of the car disposed with their webs 3 vertically, inwardly extending top flanges 4. having their edges butt welded together 40 as at 5. and outwardly extending bottom flanges i, which are slightly shorter and thicker than the top flanges 4. The side sills 1 between the bolsters 8 are of the fish bellied type, each comprising a relatively thin vertical web plate 9 with a wide comparatively thick top flange plate 10 welded to the top edge of the web and a some:

what thicker and narrower flange plate I l secured to the bottom edge of, the web by means of a continuous weld, said top and bottom flange plates l0 and ii forming the chord members for the side sills. As. the entire load on this underframe is carried by the side sills or girders in conjunction with the Z-bar center sill it is desirable to have the side sills of considerable depth and to have the webs of the side sills spaced as far apart as pos'sible to support the load and in order to obtain the maximum width within clearance limitsallowed by the'A. A. R. in a car underframe construction, the top and bottom flange plates Ill and II are not centrally connected to the webs 9, but have their greatest portion extending inwardly toward the center of the car.

The center and side sills are connected to gether at intermediate points between the bolsters by means of cross-ties l2 of channel section which have their inner ends resting on the outwardly extending bottom flanges 6 of the Z-bar center sill members and welded thereto and their vertical webs, while the outer ends are welded to the webs 9 of the side sills I. At intermediate points of the underframe cross-bearers l3 extend under the center sills and are welded to the bottom flanges 6 as at l4 while their outer ends are seated on lower inwardly extending portions of the flange plates II and welded thereto and to the webs of the side sills.

The bolster 8 comprises a single web plate IS on each side of the center sill having a top cover plate or tension member [6 welded thereto at their upper edges which extends from side sill to side sill with its ends secured tdthe top flange plates It! as at II. The compresion member for the bottom of the bolster consists of three plates, the two outer ones l8 are narrower and considerably thicker than the central one I9 which is secured to and connects the lower flanges 6 of the center sill members and has a center plate mounted on the lower face and a center brace 2| is welded to the upper surface and to the webs of the center sill members. The

.two outer plates l8 extend from the side sills to the center sill with their ends resting on the bottom flanges of the same and welded thereto. The bolster web plates are further reinforced at intermediate points by means of vertical rib plates 22.

The end portions of the side sills between the bolstersand the end sills 23 are formed of Z- shaped pressed metal members 24 which are butt welded thereto as at 25, and disposed with their webs vertically and their upper flanges extending outwardly and perforated to receive bolts for securing a portion of the flat car floor thereto.

The end sill 23 comprises a vertical web plate on each side of the center sill with a flanged inwardly extending lower edge 26 and a cover plate portion 21 formed integral with the vertical web plate portions is welded to the tops of the center and side sills to which are secured the end stake pockets 28 and a diagonal brace 29 having its opposite end extending to the bolster.

A separate flat bar 30 of less thickness than the top flange plate In of the side sill provided with punched bolt holes is welded to the outwardly extending top flange of each of the side sills and is adapted to form an integral portion therewith for attaching the car floor 3| to the side sills. The object of this separate plate 30 is to avoid the necessity of drilling holes in the top flange plate ID of the side sill as it would be impossible to punch this plate due to the small size of the holes required and the thickness of the plate.

In order to further support the car floor at intermediate points between the bolsters and the side and center sills Z-bar shaped floor stringera 32 are welded to the tops of the cross-ties 12 having their ends secured to the bolsters.

The side sills at spaced interva s ar pr vided shows a modified form of an underframe arrangement for a box car in which the major portion of the load is carried by the center sill. In this underframe the center sill construction I is the same as above described for Figs. 1 to 7, in-

clusive, and-the same reference numerals will apply thereto and comprises two rolled metal 2- bars 2 extending the full length of the car dis posed with their webs 3 vertically and having inwardly extending top flanges 4 with their edges butt welded together as at 5, and outwardly extending bottom flanges 6 which are slightly shorter and thicker than the top flanges 4.

The side sills or bottom chord members for the car sides are each formed of an angle 36 disposed with one leg extendi'ng horizontally inwardly and the other leg extending vertically upwardly and secured to the car side 31. A subsill formed of a bulb angle. 33 is welded to the under side of the intermediate portion of the horizontally extending angles 36 and supports and connects the rolled I-bar cross-bearers 39 and cross-ties 40 at the outer ends and are welded thereto as indicated. The inner ends of the cross-bearers 39 are supported on the outwardly extending bottom flanges 6 of the center sill and welded thereto and also to the webs 3, while the inner ends of the cross-ties 40 are welded to the intermediate portion of the webs 3 of the center sill; The Z-bar center sill members are connected together in alignment with the webs of each of the Ibar cross-bearers 39 by means of a transversely disposed plate 4| and tie-plate 42 which are welded to each other and to the center sill members.

The bolster 43 in this underframe is constructed somewhat similar to the one above described for Figs. 1 to '7, inclusive, having a single web .plate 44 on each side of the center sill with a top cover plate or tension member 45 welded to the top edge and extending to the car sides with the ends welded to the horizontal legs of the angles, 36. The bolster compression member also conslstsof three plates, the two outer plates 46 are narrower and thicker than the central plate 41 which is secured to the lower flanges of the center sill and has a center plate 48 mounted on the lower face and a center brace 49 welded to the upper surface and to the webs of the center sill. The outer plates extending from the center sill to the sides of the car. The inner ends resting on top of the outwardly extending center sill bottom flanges, while the outer ends are turned up as at 50 and welded to the ends of the web plates 44 and top tension member 45 adapted to form a rigid connection and brace the ends of the bolster and car sill. The bolster web plates are also further reinforced at intermediate points by means of vertical rib plates 5|.

At an intermediate point between the cross-tie bars which have their outei ends bent'fipwardly and welded to the horizontal flanges of the angles 40 and the bolster is a cross-tie 52 formed of I sill and each of the angles 36 is secured a z-bar shaped floor stringer 56 for supporting and'securing the floor 51 thereto.-

In this arrangement the center sill supports the major portion of the load of the carin which the number of parts is reduced'to a minimum and provides a simple, light and strong steel underframe for railway cars which is especially adapted for use in box car construction, but may be adapted for use in other'classes 0! cars equally as well.

For illustration only substantially one half of the two underframevstructures are shown but it will be understood the other half of each-is constructed in a similar manner to that shown.

Although we have shown and described our invention in considerable detail, we do not wish to be limited to the exact construction shown and described, but may use such substitutions, modiflcations or equivalents thereof, as are embraced within the scope of our invention, or as pointed out in theclaims.

Having thus described our invention whatwe claim as new and desire to secure by. Letters Patent is: v

1. A car underframe comprising center and side sills, cross-ties, body bolsters and end sills connecting the center andside sills, said side sills .formed of plate sections each having a vertical opposite ends welded to the webs and bottom flange plates of the side sills. a

'2. A car underframe comprising center sill, body bolsters and end sills, side sills of the flsh bellied type extending from bolster to bolster each formed of flat rolled plate metal'sections welded together comprising a web with flange plate members disposed at right angles to the web secured at an intermediate point to the opposite edges of the web by means of continuous welds, a Z-shaped sill butt welded to each end of the fish bellied side sills-adjacent to the body bolsters having its opposite end welded to the end sill, and cross-bearers extending under the wardly and their edges butt welded together,

side sills each formed of flat rolled plate metal sections welded together, comprising a web plate member and flange plate members disposed at right angles to the web welded 'tothe opposite edges, a Z-shaped member butt welded to each end of the side sills, end sills, body bolsters and I cross-tics each having a welded connection with the center and side sills, and cross-bearers ex-' tending under the center sill at intermediatepoints between the body bolsters and welded to the bottom flanges of the center sill having their opposite ends welded to the webs and bottom flange plates of the side sills,

4. A car underframe comprising a center sill,

' side sills each having a relatively thin vertical web with oppositely extending flanged top and bottom edges formed of relatively thick flat plate [sections welded to the top and bottom edges of the web, the flanges at the top and bottom edges of the side sills extending inwardly a greater distance from the web than the outwardly extending flanges, and a plurality of cross-bearers extending under the center sill at intermediate points and welded thereto having their opposite I ends welded to the webs and bottom flanges of theside sills.

5. A car underframe comprising a center sill formed of a pair of rolled Z-bars disposed with their webs vertically and their bottom-flanges extending outwardly and their top. flanges extending inwardly and butt welded together, side sills of the fish bellied type formed of plate sections each having a relatively thin vertical web with flat flange plate members formed of thicker material welded to the top and bottom edges of the web and extending laterally therefrom on each side of said web, and cross-bearers extending under the center sill at intermediate points and welded to the bottom flanges of the center sill having their opposite ends welded to the webs and bottom flange plates of the side sills.

6. A car underframe comprising end sills, bolsters and cross-ties, a center sill formed of a pair of rolled z-bars disposed with their webs vertically and their bottom flanges extending outwardly andthe top flanges extending inwardly and butt welded together, side sills of the flsh bellied type formed of plate sectionseach having a relatively thin vertical web member, a flat flange plate member disposed at right angles to the web and formed of thicker material welded at an intermediate point to the top and bottom edges of each of the webs, and cross-bearers extending under the center sill at intermediatepoints. and welded to the bottom flanges of the center sills having their opposite ends welded to the webs and bottom flanges of the side sills.

v7. A car underframe comprising a center sill, end sills, body bolsters andcross-ties securedto the center sill, side sills of the fish bellied type connecting the outer ends of the bolsters, each of said side sills between the bolsters being formed of a plurality of flat rolled metal plates and having a relatively thin web'plate portion, a flange platemember formed of thicker material welded to one edge of the web and extending laterally from each side of said web, a flange plate narrower and thicker than the first flange plate welded to the opposite edge of the web and extending laterally therefrom, said flange plates adapted to extend laterally a greater distance from the web toward the center of'the car, and cross-bearers extending under the center sill at intermediate points and welded thereto having their opposite ends welded to the webs and bottom flange plates of the side sills.

8. A car underframe compris ng a center sill, end sills,'bcdy bolsters and cross-ties secured to the center sill, side sills of the fish bellied type connecting the outer ends of thebolsters, each of said side sills between the bolsters formed of v a plurality of flat rolled metal plates and having arelatively thin vertically disposed web plate Bil portion, a flange plate member formed of th cker material disposed at right angles thereto welded to the top edge of the web and extending laterally from each side of said web, a flange plate narrower and thicker than the first flange plate welded to the bottom edge of the web and disposed at right angles thereto and extending laterally from each side of said web, said top and bottom flange plates adapted to extend laterally a greater distance from the web of the side sills toward the center of the car, a Z-bar welded to each end of the flsh bellied side sill having its opposite end extending to the end sill and welded thereto, and cross-bearers extending under the center sill at intermediate pointsand welded to said center sill having their opposite ends welded to the webs and bottom flange plates of the side sills.

9. A car underframe comprising a center sill, side sills formed of rolled metal plates welded together each having a relatively thin web portion and comparatively thick laterally'extending flange plate portions along the top and bottom edges, end sills, body bolsters, cross-ties and cross-bearers connecting the center and side sills, a flat bar of thinner material than the flange plates welded to the outer edges of each of the top flange plates of the side sills, and punched bolt holes formed in the flat bars adapted to receive bolts for attaching a car floor thereto.

10. In a flat car underframe, a center sill extending the full length of the car formed of a pair of Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly, side sills each having a vertical web with laterally extending top and bottom flanges, a body bolster comprising a center brace between the z-bar center sill members, a single web plate on each side of the center sill extending to the side sills, awelded connection between the web plate and the center and side sills, a top cover plate extending from side sill to side sill and welded to the center and side sills and the top edges of the web plates, a compression member for the bolster. having a central plate port-ion formed of relatively thin material secured to and connecting the bottom flanges of the center sill, and'an outer plate member on each side of the center sill formed of narrower and thicker material than the'central plate welded to the bottom of each web plate the inner ends 'of sa-d outer plate. members resting on and welded to the top of the center sill bottom flanges and. the outer ends extending to the car side and welded to the bottom flanges 01 the side sills.

11. A car underframe comprising a center sill formed of a. pair of 'Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly and their top flanges extending inwardly and the edges butt welded togither. side sills extending the full length of the under-frame each having a vertical and inwardly extending flange, o. sub-sill welded directly to the intermediate portion of each inwardly extending flange of the side sills. and cross-bearers having their inner ends welded to the webs and the top surfaces of the bottom flanges oi the centersiil and the outer ends welded to the sub-sills.

12. A car undcrirame comprising a center sill formed of a. pair of l-bars disposed with their webs vertically and having their bottom flanges extending outwardly and their top flanges extendillg inwardly nnd the edges butt welded together. side sills each having a vertical and inwardly extending flange adapted to form the bottom chord members for the car side, a sub-sill welded to the intermediate portion of the inwardly extending flange of each of the side sills, crossbearers at intermediate points of the underframe having their inner ends welded to the webs and the top surfaces of the bottom flanges of the center sill and their outer ends welded to the sub-sills, a transverse plate between the Z-bar center sill members in alignment with each of the cross-bearers and welded to the center sill, and a tieplate below each transverse plate weld ed to the bottom edge of the transverse plate and the bottom flanges of the Z-bar center sill members.

13. A car underframe comprising a center sill formed'of a pair of Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly and their top flanges extending inwardly, and butt welded together, side sills each adapted to form the bottom chord member for the car side, a sub-sill formed of a bulb angle welded to the intermediate portion of each of the side sills, a cross-bearer for the car underframe formed of a pair of rolled I-bar sections each having its inner end welded to the web and the top surface of the bottom flange of one of the z-bars of the center sill and its outer end welded to one of the sub-sills, a transverse plate between the Z-bar center sill members in alignment with the webs of the I-bar sections of the cross-bearer welded to the webs and top flanges of the center sill, and a tie-plate below the transverse plate welded to the bottom edge of the transverse plate and the bottom flanges of the center sill.

14. A car underframe comprising a'center sill formed of a pair of Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly and their top flanges extending inwardly and the edges butt welded together, side sills each formed of an angle having an inwardly extending bottom flange adapted to form the bottom chords for the car sides, a subsill formed of a bulb angle having one of its legs disposed horizontally and welded to the intermediate portion of the inwardly extending flange of each of the side sills, and cross-ties formed of rolled I-bars having their inner ends welded to the intermediate portions of the websv of the Z-bar center sill members and their outer ends bent upwardly and welded to the lower surface of the bottom flanges of the side sills.

15. A car underirame comprising a center sill formed of a pair of Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly and their top flanges extending inwardly and the edges butt welded together, side sills adapted to form the bottom chords for the car sides each having a vertical web attached to the car side and an inwardly extending flange for supporting the car floor adjacent to the car side, a sub-sill welded to the intermediate portion of the inwardly extending flange of each side sill, cross-ties formed of I-bars having their inner ends welded to the intermediate portion'of the webs of the Z-bar center sill members and their outer end portions bent upwardly and welded to the sub-sills. and longitudinally extending floor stringers formed of 2- bars connecting and welded directly to the tops oi the I-bar cross-ties at intermediate points.

16. In a flat ear underirame. a ccnicr sill extending the full length of the car formed of a pair of 'Z-bars disposed with their webs vertically and having their bottom flanges extending from side sill to side sill and welded to the top flanges of the center and side sills and the top edges of the web plates, a plate welded to the bolster center brace and the bottom flanges of the center sill, and a plate formed of relatively thick material welded to the bottom edges of eachweb plate and attached to the upper surface of the lower flange oi the center sill and extending to the side sills.

17. A flat car underirame comprising a pair of Z-bars forming a center sill and side sills each formed with an inwardly extending bottom flange, abolster having a single web plate disposed on each side of the center sill, a cover plate for the bolster extending from side sill to side sill and welded to the top flanges of the center and side sills and the top edges of the web plates, a central bottom plate for the bolster of relatively thin material securedto and connecting the lower flanges of the center sill, and a bottom cover plate for each or the bolster web plates formed of relatively thick material each extending from the center sill to the side sill and welded to the upper surfaces of the bottom flanges of said side and center sill and bottom edge (if each of the bolster web plates.

18. In a flat car underframe, a center sill formed in! a pair of Z-bars disposed with their webs vertically and having their bottom flanges extending outwardly, side sills adapted to form the bottom chord members for the car side, a body. bolster-comprising a center brace between the Z-bar center sill members, a single web plate on each side of the center sill extending to the side sills, a top cover plate extending from side sill to side sill and welded to the center sill and top flanges of the side sills and the top edges of oi each web plate, the inner-en plate members resting on and welded to the top of the center sill bottom flanges and the outer ends extending to the car sides and bent upwardly at right angles and welded to the outer ends of the webs and top cover plate beneath the side sills.

20. A car-underi'rame comprising a center sill formed of a pair of rolled Z-bars extending the full length of the car underframe and disposed with their webs vertical. and their bottom flanges center'sill members, said bolster having a single vertically disposed web plate between the center sill and each side sill, vertical rib plates for reinforcing the web plates, a top cover plate welded to'tne top of the center sill and'the top edges of the web plates and extending from side sill to side sill with the ends welded thereto, a compression member for the bolsterformed in three parts comprising a central portion connecting the-lower flanges oi the Z-bars of the center sills together and end portions of narrower and thicker material secured to the lower edges of the web plates each extending from the bottom flanges of the center sill to a side sill and welded thereto.

21. A car underirame comprising center and side sills, cross-ties, cross-bearers, body bolsters and end sills connecting the center and side sills together and welded thereto, said side sills between the bolsters each having a vertical web plate member, plate flange members of thicker material than the web disposed at right angles to the web plate at the top and bottom edges and welded thereto, flat bars extending 'from bolster to bolster welded to the outwardly extending edges of the top plate flange member and perforations formed in the flat bars adapted to form means for attaching a car floor thereto.

22. A car underframe comprising center and end sills, body bolsters and cross-ties, side sills of the flsh bellied type connecting the bolsters,

the w b plat a compression member f r th acn of said side sills between the bolsters havbolster having a central plate portion formed of relatively thin material secured to and connecting the bottom flanges of the center sill, an outer plate member on each side of the center sill formed of narrower and thicker material welded to the bottom of each single web plate, the inner ends of said outer plate members resting on and welded to the top of the center sill bottom flanges and the outer ends extending to the side sills and welded to the inwardly extending bottom flanges.

19. In a car underframe, a center sill formed of a pair of Z-bars disposed with their webs vertically and having their'bottom flanges extend-1 ing outwardly, side sills adapted to form the bottom chord members for the car sides, a body bolster comprising a center brace between the z-bar center sill members, a single continuous web plate on each side of the center sill extending to the side sills, a top cover plate extending from side sill to side siiland welded to the top flanges of the center and side sills and the top'edges of the web plates, a compression member for the ulna vertical web plate member and plate flange members of thicker material disposed at right angles to the web plate member and each arranged with their greatest portions extending toward the center of the car and secured to the top and bottom edges of the web plate member by means of a continuous welded connection, said plate flange m 'mbers adapted to form the top and bottom chord members for each of the side sills.

23. A car underframe comprising center and end sills, body bolsters and cross-ties, side sills of the fish bellied type connecting the outer ends of the bolsters, each of said side sills between the bolsters formed of a plurality of flat rolled plate metal sections, comprising a relatively thin web plate portion, a plate flange member formed of thicker material welded to the top edge of the web and another plate flange member narrower and thickerthan the top plate flange member welded to the lower edge of. the web, a flat bar of thin material extending from bolster to bolster welded to each of the outwardly extending edges of the top plate flange members, a. Z-bar welded to each end of the side sill having its opposite bars, and perforations formed in the flat bars and top flanges o! the Z-bar end portions of the side sills adapted to form means for attaching a car floor thereto.

24. A car underirame comprising a center sill formed of a pair of Z-bars disposed with their webs vertical and having their bottom flanges extending outwardly and their top flanges extending inwardly and the edges butt welded together, side sills, cross-bearers, cross-ties and end sills connecting the center and side sills, body bolsters each connecting the side sills with a center brace between the z-bar center slll members, said bolster having a single vertically disposed web plate between the center sill and each side sill, vertical longitudinally extending rib plates secured to the web plates at intermediate points between the center and side sills for reinforcing the web plates, a top cover plate welded to the top of the center sill and to the top edges oi! the bolster web plates and extending from side sill to side sill with its ends welded thereto. a compression member for the bolster formed in three parts comprising a central plate portion connecting the lower flanges of the Z-bar members of the eenter'sill, and end plate'portions of narrower and thicker material welded to the lower edges of the webs each extending from center sill tothe side of the car.

25. A car underirame comprising a pair of center sill members and side sills, cross-bearers, cross-ties, end sills and body bolsters connecting the center and side sills together, said body thepair of center sill members. a single vertically disposed web plate between the center sill and each side sill, vertical-longitudinally extending rib plates secured to the web plates at intermediate points between the center and side sills for reinforcing the web plates, a top cover plate welded to the top of the center sill and to the top mess of the web plates and extending from side sill to side sill with its ends welded thereto, a compression member for the bolster formed in three parts having a thin central platelporfion secured to and connecting the lower surface or.

the moi center sillmembers. and end plate portions of narrower and thicker material welded to the lower edges of the webs and each extending from the center sill to the side of the car and welded thereto.

Louis 6. mum.

JOHN E. 'rEssEYMAN.

CERTIFICATE OF CORRECTION. Patent No. 2,185,05h. December 12, 1959.

JOHN E. TESSEYHAN, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page h sec- 0nd column, line 20,- claim 15, after "each" insert having a vertical and inwardly extending flange; line 22, after "welded" insert directly; line 25, same claim 13, before "each" insert the inwardly extending of;

and that thesaid Letters Patent shouldbe readuith this correction there-. in that the same may confom to the recordorthe case inthe Patent Office.

Signed and sealed this 30th day of January, A. D. 19!;0.

. Kenn Van Arsdale, l) Acting Commissioner of Patents. 

